<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./lib/bootstrap.css">

</head>

<body>
  <div class="container">
   <!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h4 class="modal-title" id="myModalLabel">Modal title</h4>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">是</button>
        <button type="button" class="btn btn-primary" data-dismiss="modal">我再</button>
      </div>
    </div>
  </div>
</div>
  </div>
</body>
<script src="lib/jquery.slim.min.js"></script>
<script src="lib/popper.min.js"></script>
<script src="lib/bootstrap.js"></script>
<!-- <script src="js/ajax.js"></script>
<script src="js/index.js"></script> -->
<script>

</script>

</html>